Tse meanwhile has questioned the very basis of the distinction between images and objects, noting that her Ilfochromes are printed on polyester backing and are polymer coated.

Bochner's experiments in color photography--for example, the grid of twelve Ilfochrome prints of shaving-cream and Vaseline smears that makes up Transparent and Opaque, 1968, and the two Polarized Light (both 1968) C-prints--dramatize the peculiarity of the photographic surface in their muddying of the distinction between optical and chemical color and their demonstration of the interpenetration of light and dye in the constitution of the color photograph.